Where Refined Design Meets Build Expertise.
A full-service interior design studio specializing in new construction, renovations, and architecturally driven spaces.
Who We Are
Muller Design & Co is a full-service interior design studio specializing in new construction, large-scale renovations, and commercial interiors.
Our work is defined by a design-first, process-driven approach grounded in real-world build experience.
With a deep understanding of how projects are executed, we partner closely with builders, architects, and clients to guide each phase from early planning through final delivery.
We bring structure to complex decisions, aligning design intent with budget, timelines, and construction realities. The result is a seamless process and a space that is not only well designed, but fully realized as intended.
The Studio
Cara Camille Watt
Cara brings a bold, confident perspective to interior design, informed by strong architectural lines and expressive design choices. With experience collaborating across design and build teams, she creates spaces that are both visually striking and purpose-driven.
Grounded in thoughtful planning and a fearless approach to color, texture, and form, Cara is known for designs that feel intentional, distinctive, and expertly executed.
With a deep appreciation for architecture and statement-making interiors, Cara approaches each project with clarity and conviction—balancing creativity with structure to ensure design intent translates seamlessly into the built environment.
Originally from South Africa, Cara’s global perspective informs her design sensibility, blending architectural rigor with expressive creativity.
Now based in Florida, she draws inspiration from the region’s light, landscape, and architectural diversity, and lives with her husband and their two English bulldogs.
Liezl Müller
Liezl is a creative visionary with deep expertise in custom home design and residential construction.
With over six years of hands-on experience working alongside a custom home builder, she brings a holistic, highly practical approach to every project—seamlessly blending form, function, and buildability to create homes that elevate everyday living.
Known for her clarity, attention to detail, and calm leadership throughout complex projects, Liezl guides clients from early planning through final selections, ensuring design intent is translated into thoughtful, executable decisions.
Her passion for interiors, refined details, and new construction informs every space she creates.
Originally from South Africa, and shaped by time living in Switzerland, Liezl brings a global perspective to architecture and design.
She now calls Charlotte home, where she lives with her husband, two sons, their French bulldog and Bengal cat.
Let's Work Together
To ensure the highest level of attention and execution, we take on a limited number of projects each year.
We partner with clients who value thoughtful design, clear process, and a collaborative approach from the outset. Whether building a custom home, undertaking a significant renovation, or shaping a commercial space, our role is to bring clarity to complex decisions—aligning vision, architecture, and construction into a cohesive, well-executed result.
Our process begins early, often before plans are finalized, allowing us to influence key decisions that impact both the design and the build. From spatial planning and material direction to builder coordination and on-site oversight, we remain closely involved throughout, ensuring that every detail is considered, intentional, and fully realized.
If you’re planning a project and looking for a design partner who understands both the creative and the construction side of the process, we’d welcome the opportunity to connect.
Get In Touch
